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IWR1642: Power on/off sequence

Chris Meng
Mastermind 37796 points
Part Number: IWR1642
Other Parts Discussed in Thread: AWR1642

Hi,

My customer is asking the power on/off sequence info of IWR1642.

I have recommended the customer to copy the power design from EVM, but they are still asking for such info. Would you pls kindly help?

Thanks,

  • 0
    TI__Guru 58035 points
    Hello Chris,
    If you refer to the AWR1642 datasheet section 5.10 you can find the power supply sequencing and reset timing mentioned.

    Regards,
    Vivek
  • 0 in reply to Vivek Dham
    TI__Mastermind 37500 points

    Hello Chris,

    As Vivek pointed out, the power sequencing is that all rails come to the nominal value, as the datasheet indicates, then there is a few millisecond delay, and then the nRST is released.

    Section 5.4 has the power supply limits.

    Fig 5-2 shows the 3ms time after power is stable before releasing the nRST.

    Table 5-2 shows what the power quality should be, related to ripple and noise for the 1.8v analog, and 1.3v analog inputs.

    As for the DC power design, the EVM is a good starting point.

    REgards,

    Joe Quintal

  • 0 in reply to Radio-Joe
    TI__Mastermind 18500 points
    Hi Chris,

    Since we have not seen activity on this thread in over a week we are considering this post closed. Please open up another post if you have further questions.

    Thank you,
    Randy